Abstract A comparative investigation monitoring biological, chemical, and physical parameters of three subalpine lakes in Wyoming was undertaken during 1981 to determine the impact of introduced Mysis relicta (opossum shrimp) on these lakes' ecosystems. General life history characteristics of the introduced mysid populations were analyzed in relation with the limnological data. The introduced shrimp populations were found to be strongly influenced by ambient water quality and lake productivity. Applying the results of this study and other information from the scientific literature, a fisheries management tool utilizing decision criteria was developed to aid in predicting the success of Mysis relicta introductions.
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